$name - King County

Green Lake- West A734WSB

For algal toxin data please visit the State Toxic Algae web page and follow the “Find Lake” menu.

Please select a site and a year

Sample Date	Temperature (°C)	Temperature (°F)	Included in Bacteria Geomean Calculation?	Daily Average Bacteria	Bacteria Geometric Mean – using the three most recent samples
09/23/2019	18.0	64.4	No	not sampled
09/16/2019	20.0	68.0	Yes	4	12
09/09/2019	21.0	69.8	Yes	22	16
09/03/2019	22.0	71.6	Yes	24	15
08/26/2019	23.0	73.4	Yes	8	12
08/19/2019	23.0	73.4	Yes	20	10
08/12/2019	23.0	73.4	Yes	13	7
08/05/2019	25.0	77.0	Yes	5	11
07/29/2019	24.0	75.2	Yes	7	16
07/22/2019	24.0	75.2	Yes	40	14
07/15/2019	23.0	73.4	Yes	15	12
07/08/2019	22.0	71.6	Yes	5	8
07/01/2019	22.0	71.6	Yes	28	11
06/24/2019	21.0	69.8	Yes	5	8
06/17/2019	23.0	73.4	Yes	11	6
06/10/2019	22.0	71.6	Yes	10	11
06/03/2019	21.0	69.8	Yes	3	19
05/28/2019	20.0	68.0	Yes	53	44
05/20/2019	18.0	64.4	Yes	46
05/13/2019	20.0	68.0	Yes	36

Table Legend

Cell Color	Bacteria Value	Concern Level
	Individual day <= 200 CFU/100 ml	Low Concern - safe for swimming
	Individual day > 200 & <= 1000 CFU/100 ml	Moderate Concern – still safe for swimming
	Individual day > 1000 CFU/100 ml or geometric mean > 200 CFU/100 ml	High Concern – probable closure. For more information see Beach Closure Protocol

NOTE: Beach closure and reopening decisions are made by Public Health – Seattle & King County. Decisions are based on these results plus additional information about beach conditions, and may not always match the concern levels shown here.

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ADDITIONAL ALGAL TOXIN DATA is available for Green Lake for samples submitted throught the Washington State Toxic Algae Program. For more information visit the Washington State Toxic Algae Program database website.
Washington State Toxic Algae Program Database

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